Hydraulic vibration damper with noise reduction damping valves

Details Hydraulic vibration damper with noise reduction damping valves Hydraulic vibration damper with noise reduction damping valves

1981-04-22

1983-08-30

Butler, Douglas C.

Brakes

Internal-resistance motion retarder

Resistance alters relative to direction of thrust member

18832214, 18832215, 1375133, F16F 9348, F16F 934

Patent

active

044011962

ABSTRACT:
A hydraulic vibration damper featuring reduced noise characteristics wherein a first and a second damping valve system operate in response to fluid pressure to control flow of damping fluid in each direction of movement, respectively, of a piston of the damper. The first and second damping valve systems include a preliminary throttling aperture, an aperture disc defining a preliminary aperture located downstream relative to the direction of fluid flow through the respective damping valve systems, and a noise reduction mechanism for producing a post-throttling effect downstream of the preliminary aperture, the noise reduction mechanism being formed by a baffle plate located to be impinged by fluid flowing through the preliminary aperture, the baffle plate being arranged to define a quieting duct immediately adjacent the baffle plate upstream thereof.

REFERENCES:
patent: 2732039 (1956-01-01), Funkhouser et al.
patent: 3194262 (1965-07-01), Hamilton et al.
patent: 3756357 (1973-09-01), Graff et al.
patent: 3837445 (1974-09-01), Pierle
patent: 3844389 (1974-10-01), De Carbon
patent: 4034860 (1977-07-01), Leppich
patent: 4076276 (1978-02-01), Wijnhoven et al.
patent: 4109767 (1978-08-01), Nandyal et al.
patent: 4121704 (1978-10-01), Nicholls
patent: 4203507 (1980-05-01), Tomita et al.

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